1. break.py
2. eval_cond.py
3. loop.py
4. therapist.py
5. while.py
6. whilevsfor.py

# Compares two versions of the same program, one uses break, one doesn't.
# Sara Sprenkle

# ---------- while LOOP ----------


# condition says when loop will continue
x=eval(input("Enter number: "))
while x % 2 != 0 :
	print("Error!")
	x = eval(input("Try again: "))
print(x, "is an even number. ") 


# ---------- while LOOP USING break ----------

print("--"*10)
print("Again, but using break")

# have to look inside loop to know when it stops
while True :
	x = eval(input("Enter number: "))
	if x % 2 == 0 :
		break
	print("Error!")
print(x, "is an even number.")

# Examples of advanced conditionals
# by Sara Sprenkle

x = 2
y = 3
z = 4

b = x==2
c = not b

# Note: because of precedence, we don't _need_ parentheses
# I added parentheses for readability/emphasis
d = (y<4) and (z<3)
print("d =", d)

d = (y<4) or (z<3)
print("d =", d)

d = not d
print(b, c, d)

# What does this loop do?
# Sara Sprenkle

count = 1
while count > 0:
	print(count)
	count += 1

# The Very Simple Therapist
# CSCI 111

print("-"*60)
print("Welcome to computerized therapy!")
print("You will get your money's worth.")
print("Our session is over when you have nothing more to tell me.")
print("-"*60)

user_input = input("Tell me what's wrong.\n")

while user_input != "":
    user_input = input("How does that make you feel?\n")

print("Thank you!  Come again!")

# Demonstrates a simple while loop.
# Trace through program and show what would be output.
# Sara Sprenkle

i = 0
while i < 10 :
    print("i equals", i)
    i+=1
print("Done", i)

# Code to compare a while loop with a for loop
# by Sara Sprenkle

# ---------- WHILE LOOP ----------

print("While Loop Demo")
i=0
while i < 10:
    print("i equals", i)
    i += 1
print("Done", i)

# ---------- FOR LOOP ----------

print("\nFor Loop Demo")
for i in range(10):
    print("i equals", i)

print("Done", i)

# To give exactly the same output as the while loop, would need to print out i+1